[Django]-How to use custom django templatetag with django template if statement?

by

9👍

✅

The easiest way would be to use an assignment tag..

https://docs.djangoproject.com/en/dev/howto/custom-template-tags/#assignment-tags

@register.assignment_tag(takes_context=True)
def unread_messages_count(context):
    user = context['request'].user
    return len(user.messages_unread.all())

{% unread_messages_count as cnt %}
{% if cnt %}
   foo
{% endif %}
👤Yuji 'Tomita' Tomita

2👍

you can use a django custom filter https://docs.djangoproject.com/en/dev/howto/custom-template-tags/#writing-custom-template-filters

def unread_messages_count(user_id):
  # x = unread_count   ## you have the user_id
  return x

and in the template

{% if request.user.id|unread_messages_count > 0 %}
  some code...
{% endif %}
👤mabdrabo

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